define(function(require, exports, module) {
    
    function box1(opt) {
        if (!(this instanceof box1)) {
            return new box1(opt);
        }
    }

    box1.prototype = {
        init: function () {
            document.getElementById('box1').innerHTML = "box1 write by js"
        }
    }

    module.exports = box1;
})